package com.jytc.framework.utils;

/**
 * @title: FirstCharUtils.java
 * @description: 获得汉字首字母
 * 
 * @author jcm
 */
public final class FirstCharUtils
{

	//字母Z使用了两个标签，这里有２７个值

	//i, u, v都不做声母, 跟随前面的字母

	private char[] chartable = { '啊', '芭', '擦', '搭', '蛾', '发', '噶', '哈', '哈', '击', '喀', '垃', '妈', '拿', '哦', '啪', '期', '然', '撒',
			'塌', '塌', '塌', '挖', '昔', '压', '匝', '座' };

	private char[] alphatable = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
			'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };

	/**初始化*/
	private int[] table = new int[27];
	{
		for (int i = 0; i < 27; ++i)
		{
			table[i] = gbValue(chartable[i]);
		}
	}

	/**
	 * 构造函数
	 */
	public FirstCharUtils()
	{
	}

	/**
	 * 主函数,输入字符,得到他的声母
	 * 英文字母返回对应的大写字母
	 * 其他非简体汉字返回 '0'
	 * 
	 * @param ch
	 * @return
	 */
	public char char2Alpha(char ch)
	{
		if (ch >= 'a' && ch <= 'z')
			return (char) (ch - 'a' + 'A');
		if (ch >= 'A' && ch <= 'Z')
			return ch;

		int gb = gbValue(ch);
		if (gb < table[0])
			return '0';

		int i;
		for (i = 0; i < 26; ++i)
		{
			if (match(i, gb))
				break;
		}
		if (i >= 26)
			return '0';
		else
			return alphatable[i];
	}

	/**
	 * 根据一个包含汉字的字符串返回每个汉字拼音首字母的字符串
	 * 
	 * @param SourceStr
	 * @return
	 */
	public String string2Alpha(String SourceStr)
	{
		String Result = "";
		int StrLength = SourceStr.length();
		int i;
		try
		{
			for (i = 0; i < StrLength; i++)
			{
				Result += char2Alpha(SourceStr.charAt(i));
			}
		} catch (Exception e)
		{
			Result = "";
		}
		return Result;
	}

	/**
	 * 根据包含汉字的字符串返回第一个汉字的拼音首字母
	 * 
	 * @param SourceStr
	 * @return
	 */
	public String string2AlphaFirstChar(String SourceStr)
	{
		String Result = "";
		try
		{
			Result += char2Alpha(SourceStr.charAt(0));
		} catch (Exception e)
		{
			Result = "";
		}
		return Result;
	}

	/**
	 * 区配字符
	 * 
	 * @param i
	 * @param gb
	 * @return
	 */
	private boolean match(int i, int gb)
	{
		if (gb < table[i])
			return false;
		int j = i + 1;
		//字母Z使用了两个标签

		while (j < 26 && (table[j] == table[i]))
			++j;
		if (j == 26)
			return gb <= table[j];
		else
			return gb < table[j];
	}

	/**
	 * 取出汉字的编码
	 * 
	 * @param ch
	 * @return
	 */
	private int gbValue(char ch)
	{
		String str = new String();
		str += ch;
		try
		{
			byte[] bytes = str.getBytes("GB2312");
			if (bytes.length < 2)
				return 0;
			return (bytes[0] << 8 & 0xff00) + (bytes[1] & 0xff);
		} catch (Exception e)
		{
			return 0;
		}
	}

	public static void main(String[] args)
	{
		FirstCharUtils obj1 = new FirstCharUtils();
		System.out.println(obj1.string2Alpha("测试：中华人民共和国！"));
		System.out.println(obj1.string2Alpha("裴贺先"));
		System.out.println(obj1.string2Alpha("KFC"));
		System.out.println(obj1.string2Alpha("必胜客"));
		System.out.println(obj1.string2Alpha("法式小面包"));

		System.out.println(obj1.string2AlphaFirstChar("测试：中华人民共和国！"));
		System.out.println(obj1.string2AlphaFirstChar("裴贺先"));
		System.out.println(obj1.string2AlphaFirstChar("KFC"));
		System.out.println(obj1.string2AlphaFirstChar("必胜客"));
		System.out.println(obj1.string2AlphaFirstChar("法式小面包"));
		System.out.println(obj1.string2AlphaFirstChar("苏大姐火锅"));
		System.out.println(obj1.string2AlphaFirstChar("麦当劳"));
		System.out.println(obj1.string2AlphaFirstChar("斗牛士"));
		System.out.println(obj1.string2AlphaFirstChar("一楼后座"));
		System.out.println(obj1.string2AlphaFirstChar("豪尚豪"));
		System.out.println(obj1.string2AlphaFirstChar("好美味"));
		System.out.println(obj1.string2AlphaFirstChar("昊"));
		System.out.println(obj1.string2AlphaFirstChar("爱上爱"));
	}
}
